Long-lived ornamental trees of Zanjan province

Long-lived trees are living environmental resources. They are important in this regard because they have undergone different climatic conditions. These trees are the genetic treasure of nature. During the registration of long-lived trees in Zanjan province, 48 ornamental and fruit trees were recorded. Twenty one trees were ornamental including species from juniper, willow, pistachio, oak, European nettle, plane, and poplar. Some characteristics including DBH, total height, trunk height, canopy area, health status, and geographical position were recorded. Maximum and minimum DBH belonged to plane and European nettle trees, respectively. Seven trees including pistachio, willow, European nettle, and plane require urgent attention due to injuries. In addition, the only long-lived white poplar tree is a native cultivar of the province and may be cut due to private ownership. Registered oak trees also lack natural regeneration. Willow and plane trees are present in farms and residential areas, and without exception, have the benefit of proximity to permanent water resources. Only in one case, people were cutting down small branches of trees to ward off calamity from children, livestock, and so forth.